Revert "Redirect widgets to another location before deleting them"

This reverts commit 275d88dd4f.

src/components/views/elements/AppTile.js

@@ -318,19 +318,6 @@ export default class AppTile extends React.Component {
                         }
                         this.setState({deleting: true});
 
-                        // HACK: This is a really dirty way to ensure that Jitsi cleans up
-                        // its hold on the webcam. Without this, the widget holds a media
-                        // stream open, even after death. See https://github.com/vector-im/riot-web/issues/7351
-                        if (this.refs.appFrame) {
-                            // In practice we could just do `+= ''` to trick the browser
-                            // into thinking the URL changed, however I can foresee this
-                            // being optimized out by a browser. Instead, we'll just point
-                            // the iframe at a page that is reasonably safe to use in the
-                            // event the iframe doesn't wink away.
-                            // This is relative to where the Riot instance is located.
-                            this.refs.appFrame.src = '/config.json';
-                        }
-
                         WidgetUtils.setRoomWidget(
                             this.props.room.roomId,
                             this.props.id,